28820759647 has 2 divisors, whose sum is σ = 28820759648. Its totient is φ = 28820759646.

The previous prime is 28820759629. The next prime is 28820759657. The reversal of 28820759647 is 74695702882.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28820759647 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28820759591 and 28820759600.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28820759657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14410379823 + 14410379824.

It is an arithmetic number, because the mean of its divisors is an integer number (14410379824).

Almost surely, 2^28820759647 is an apocalyptic number.

28820759647 is a deficient number, since it is larger than the sum of its proper divisors (1).

28820759647 is an equidigital number, since it uses as much as digits as its factorization.

28820759647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13547520, while the sum is 58.

The spelling of 28820759647 in words is "twenty-eight billion, eight hundred twenty million, seven hundred fifty-nine thousand, six hundred forty-seven".